5.3.8. NameNode RPC latency alert

This alert is triggered if the NameNode operations RPC latency exceeds the configured critical threshold. Typically an increase in the RPC processing time increases the RPC queue length, causing the average queue wait time to increase for NameNode operations. It uses the Nagios check_rpcq_latency plug-in.

5.3.8.1. Potential causes

A job or an application is performing too many NameNode operations

5.3.8.2. Possible remedies

Review the job or the application for potential bugs causing it to perform too many NameNode operations.

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